ACL Bearings 1B1663HX-STD Race Series Rod Bearing Extra Clearance - 001

The ACL Bearings 1B1663HX-STD is a high-performance Race Series H-Series connecting rod bearing designed for demanding applications requiring precise clearances and superior durability. This individual bearing features .001" extra oil clearance, making it ideal for high-RPM performance builds and racing applications where optimized oil flow is critical.

Key Specifications:

• Housing bore diameter: 1.890"
• Journal diameter: 2.015"
• Bearing width: 0.792"
• Extra oil clearance: .001" over standard
• Sold individually (EACH)

Race Series Performance Features:

• Tri-metal construction with high-strength overlay plate and reduced thickness for improved fatigue properties
• Hardened steel backing on all rod bearings improves support and bearing retention
• Increased eccentricity compensates for bore distortion at high RPM and assists in hydrodynamic oil film formation
• No flash plating on bearing back maximizes heat transfer and grip in housing
• Chamfered bearing edges accommodate large fillet radius on performance crankshafts
• Manufactured to micron-level tolerances for consistent wall thickness and crush

ACL Race Series bearings are engineered with a unique combination of design, metallurgy, and precision manufacturing that delivers the endurance required in competitive motorsports. These bearings are trusted in engines that compete in drift racing, road racing, drag racing, and championship-winning builds across multiple racing series.